Motor for music-rolls of pneumatic musical instruments.



TATENTED MARL 10, 1908.

B'.:A". HOG: Ll TN D. I Mama FOR MUSIC" ROLLS oPj PNEUMATIC MUSICALINSTRUMENTS.

'APPLIOA-TION PI ED PI-2B. 1906.

I 7 2 SEEETS-BHEET 1.

. I WITNESSES: 4

THE NORRIS PETERS cm, WASHINGTON, n. c.

No. 881,402. PATENTED MAR. 10, I908. B. A. HOGLUNU-f MOTOR FOR MUSICROLLS OF PNEUMATIC MUSI GAL INSTRUMENTS. APPIJIOATION'FILED-FBB.7.196B;

ZSIIEETS-SHEBT 2.

IN VE N TOR WITNESSES ATTORNEY rus' NORRIS 551-512: cm, wAsmNd-rcu, n.c.

BERNDT ALFRED HOGLUND, OF NEW YORK, N. Y.

MOTOR FOR MUSIC-ROLLS OF PNEUMATIC MUSICAL INSTRUMENTS.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed February 7, 1906. Serial No. 299,945.

To all whom it may concern:

Be it known that I, BERNDT ALFRED Hoe- LUND, a citizen of the UnitedStates, residing at Williamsbridge, borough of the Bronx, city of NewYork, New York county, and State of New York, new and usefulImprovements in Motors for Music-Rolls of Pneumatic Musical Instruments,of which the following is a full, clear, and exact specification,reference being had .to the accompanying drawings and to the referencecharacters marked thereon.

My present invention has relation to motors such as are employed inpneumatic musical instruments for winding and unwinding the music roll,these motors being operated by air pressure and principally by causingan exhaustion on one side and permitting the normal pressure of theatmosphere to act upon the other side, but sometimes by the employmentof air under greater or less pressure.

The object of this invention is to provide or produce a pneumatic motorof few and simple parts, cheap and easy of construction and easy to beassembled and mounted in place for use, which will aflord abundant powerfor effectually accomplishing the desired movements of the music roll atall times when in use, which may be easily and conveniently controlledso that the movements will be rendered uniform and so that it may beeconomically operated either by air at the ordinary pressure or bycompressed air.

To accomplish all of the foregoing objects and to secure other andfurther advantages in the matters of construction, operation and use, myimprovements involve certain new and useful arrangements or combinationsof parts, peculiarities of construction and principles of operation, aswill be herein first fully described and then pointed out in the claims.

In the accompanying drawings forming part of this specification, Figurel is a Verticalview, partly in section and partly in elevation showingmy improved motor as applied in connection with the crank shaft. Fig. 2is an elevation corresponding with Fig. 1, omitting one of the valves.Fig. 3 is a vertical section and elevation as on a plane through line3-3 of Fig. 1 and looking in the direction of the contiguous arrow. Fig.4 is a sectional view of a fragment on a plane through line 4-4 of Fig.3, showing the manhave invented certain plates or pieces, as C eachconnected with four rate piece.

ner of hinging the piston in one wall of the piston chamber.

In all these figures like letters of reference, wherever they occur,indicate corresponding parts.

The principal parts of the motor are preferably made of wood, althoughany other suitable material might be employed.

A is a box of general rectangular form and of suitable size, the samebeing made air tight except for the openings specially provided thereinand being divided into compartments of substantially equal size by asuitable division strip, as represented at B. Each of these compartmentsis of general rectangular form and each constitutes a chamber for thepiston which is movable therein. Two pistons are shown in the drawings,but a greater number may be employed if so desired.

The pistons are composed of rectangular and C these being preferablymade of wood or other light material impervious to air. The pistons areof the walls and at about their middle lines by a flexible diaphragm, asrepresented at D and D, the same entering a recess in the correspondingplate-O. or O and also a recess in the surrounding portion of the pistonchamber, and being secured in place so as to prevent passage of airthrough them or through the joints from one side to the other of thepiston thus formed. may be made of leather, or of cloth coated withrubber, or of other suitable flexible material, and they aresufficiently extensive to permit of the movements of the piston from oneside to the other of the piston chamber. Each piston is hinged along onewall of the piston chamber by a piece, as D secured in the edge of theiston plate and also in the adjacent wall of the piston chamber, andthis hinge, made of leather or fabric or other flexible material may beconstituted of a portion of the diaphragm surrounding the other threeedges of the piston plate, or it may be made of a sepa- The hingespermit the pistons to move in the manner required and a portion of thewall adjacent to the hinge is recessed, as at a, so as to admit of themovements of the piston plate without interference by the wall of thepiston chamber.

Each piston is supplied with a projecting These diaphragms compress itin stem or piston rod, as E, E and these rods are connected with thecranks F, F, of a crank shaft, B. The crank shaft is preferably mountedin suitable journals, as I), b, in suitable supports as H, H, securedupon the piston chambers, and the piston rods E and E are connected withtheir respective cranks by suitable connecting rods, 1, I.

K and K are valve rods connected with and operated by the connectingrods 1. and I and serving to operate the valves, being suitablyconnected therewith by a joint, as

.at c.

L is the seat for a valve, the same being supplied with four Openingsand being sustained at a short distance from the wall of the Jpistonchambers, on an intermediate block 1 having openings through it whichco1nmunieate through suitable channels with either side of the pistonand with the trunk or reservoir.

M is one of the valves arranged to control the outlet of air from andthe inlet of air to the corresponding portion of the piston chamber, theother valve being similarly constructed and arranged.

N is a trunk or reservoir from which air may be exhausted, or, if themotor is to be driven by compressed air, constituting a receptacle forcontaining a supply of compressed air. Any suitable mechanicalmeans maybe employed to exhaust air from or the reservoir.

The valves are suitably mounted upon their respective seats and they areconfined in place by suitable guides, as (Z, (Z. Two passages in thevalve, as e and f, connect the ports in the valve seat or disconnectthem in the manner necessary for the operation of the motor. The pistonbeing in the posi- .tion indicated in Fig. 1, communication between thetrunk N and the side of the piston nearest the valve seat is establishedthrough the channel shown in dotted lines at g, the channel g in theblock or plate L the port g the channel f in the valve, the port 9 andthe opening 9 as will be readily understood. If the air be exhaustedthrough these openings the piston will be carried towards the port 9 Theother piston is at the same time moved in the opposite direction, andthis compels the continuous movement of the crank shaft and thecontinuous movement of the valves, as will be readily understood. Whenthe piston C has reached the limit of its travel in this direction, thevalve commences to shift, air having been during the previous movementadmitted to the opposite side of the piston through channel It, port7L1, passage 6 in the valve, port k channel h and port it. When thevalve is moved sufficiently in the opposite direction the port It isopened into the channel f in the valve which then establishescommunication between port l l l l l l l l 7t and port 9' and uncoversthe port 1 so that air will be exhausted from the opposite side of thepiston through port h", channel 72f, channel a, port g-, channel g, andchannel g. In this manner the piston is made to swing back and forth onits hinge in its chamber and communicates movement to the crank shaft.When the air is exhausted from one side of the piston air is admitted tothe other side so that the piston will move easily. To prevent leakageof air around the piston rods, flexible sockets, as O and O areemployed, these being secured upon the piston chambers and made to fittightly around the piston rods, as indicated.

P represents a governor bellows which is kept normally opened in caseexhaustion is employed, as by any suitable spring, or normally closed incase compressed air is employed, by any suitable form of spring orweight. Air from the exterior enters through this bellows to the channel72 or the channel 7L3, being admitted to the bellows through a tube, as'i, leading from a position where its inlet can be easily controlled. Bymeans of this regulator bellows the speed of the motor is maintained ata practically uniform rate, the normal rate being determined by thedegree to which the tube t is opened or closed. The music rolls aredriven by any suitable chain or other connection, Q, with a drivingwheel, Q mounted upon the shaft G.

The improved motor being constructed and arranged substantially inaccordance with the foregoing explanations is of few and simple parts,easily operative, economical of power, and well adapted for use inconnection with mechanical musical instruments and especially forwinding and unwinding the music rolls, but it may be employed in othersituations and for analogous purposes. The piston rods are shown ingeneral vertical position, but the motor may be placed in any position,being operative in one position as well as in another.

Having now fully described. my invention, what I claim as new herein anddesire to secure by Letters Patent, is 1- 1. In a motor for music rollsof musical instruments, the combination of the two piston chambers,hinged pistons movable therein, diaphragms connected with. the pistonsand surrounding the same, projecting piston rods, connecting rods, crankshaft, valves, valve seats, trunk or reservoir, and. a governor bellows,all constructed and arranged for operation substantially as and for thepurposes set forth.

2. The herein described motor for music rolls of musical instruments,comprising the two piston chambers, hinged pistons movable therein,diaphragms connected with the pistons and surrounding the same,projecting piston rods, connecting rods, crank shaft,

valves, valve seats, trunk or reservoir, govand a perforated blockintermediate of said ern'or bellows, drive Wheel applied on the valvesand the wall of the piston chambers, crank shaft, and means forconnecting said substantially as shown and'described.

drive Wheel with the object to be driven, all In testimony whereof, Ihave signed my 15 constructed, arranged and combined subname to thisspecification in the presence of stantially as shovfvn and desc11'1ibeii.' 1 two subscribing witnesses.

3. Inamotor or music ro s 0 musica instruments, the combination of thepiston BERNDT ALFRED HOGLUND' chambers having inlets and outlets for airWitnesses:

thereto and therefrom, of hinged pistons C. SEDGWIOK, movable in saidchambers, regulator valves J. M. HOWARD.

